Naruto is the Jinchuriki of the Nine-tails. He is a very dangerous person. Even though he is kind and harmless, being a jinchuriki always ruins that side. No one believes. So they forcefully captured Naruto and send him to the Himiko clan compound to be a Slave

Many slaves are there in line with Naruto being one of them. The Heir of that clan , Kuna was there told to choose one Slave for himself. As the other slave told their names

Naruto: "i am ...Naruto Uzumaki" he said trembling